Sierra BT- S8 Wireless Bluetooth Speaker (Black) Bluetooth Technology allows you to Connect wirelessly up to 33 feet away. Seamlessly stream and share music, movies, games, phone and conference calls anywhere. Premium Sound with Bass Enhance Technology. Two powerful 40mm Drivers deliver crisp clean sound with deep bass Built-in Li-Ion Rechargeable Battery for up to 10 hours of playtime. Built-in microphone for hands-free speaker phone calling Easy to pair - No code/pin needed 3.5mm Audio Line In - Don't have Bluetooth? The Sierra S8 allows you to connect the speaker directly to a standard headphone jack.